탄소중립을 위한 이산화탄소 포집과 직접 메탄화 촉매 개발

초록

The integrated CO2 capture and direct methanation (ICCM) system has emerged as a promising approach forproducing value-added chemicals by directly converting captured CO2 into CH4. Unlike conventional CO2 capture andutilization processes, ICCM eliminates the need for regeneration and CO2 purification, reduces thermal energyrequirements, and simplifies overall system design. This paper provides a comprehensive review of the dual functionalmaterials (DFMs) technology. Thermally stable Ni/CaO DFMs were devised by incorporating ZrO2 as a stabilizer. TheNi/CaZr DFMs exhibited superior thermal stability, achieving enhanced CO2 capture capacities and CH4 productivitiesover consecutive ICCM cycles compared to Ni/CaO. Additionally, we developed a Ru/K2CO3-MgO catal-sorbent for ICCMapplications, designed to operate effectively within a temperature range of 60°C to 320°C. Through this review of the DFMtechnology, we highlight the significant potential of Zr-modified Ni/CaO and Ru/K2CO3-MgO DFMs in overcoming thethermal stability challenges of ICCM systems.

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